1021021007 has 2 divisors, whose sum is σ = 1021021008. Its totient is φ = 1021021006.

The previous prime is 1021020961. The next prime is 1021021013. The reversal of 1021021007 is 7001201201.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1021021007 - 2⁸ = 1021020751 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1021020982 and 1021021000.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021021307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510510503 + 510510504.

It is an arithmetic number, because the mean of its divisors is an integer number (510510504).

Almost surely, 2^1021021007 is an apocalyptic number.

1021021007 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021021007 is an equidigital number, since it uses as much as digits as its factorization.

1021021007 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28, while the sum is 14.

The square root of 1021021007 is about 31953.4193318962. The cubic root of 1021021007 is about 1006.9584697221.

Adding to 1021021007 its reverse (7001201201), we get a palindrome (8022222208).

The spelling of 1021021007 in words is "one billion, twenty-one million, twenty-one thousand, seven".